Ah yea, forget what I wrote earlier, that's for normal Synta mounts, not for EQDrive. For EQDrive the USB cable you are using should work fine. I don't know if the baud rate needs to be changed, but first things first. Your problem seems to be that chronyd, which is a NTP server, is trying to use the serial port looking for GPS to get time from. Many GPS dongles use the same USB-serial chip (CP2102) EQDrive uses so it can't really know what device is behind there, but it could also free the port if it can't find a GPS there.

You can stop chronyd by running "sudo systemctl stop chronyd" and try to connect after that. If that helps you can either disable or uninstall chronyd or modify its config so that it doesn't look for the GPS anymore.

 
After reboot Ekos is not seeing EQMod mount .

Hmm, odd. The EQMod INDI driver might be crashing. We'll need some logs.

Before starting Ekos, click the logs button and enable logging according to the screenshot below.

 

Then start Ekos. Then go back to the logs dialog, and click the "open logs directory" button down at the bottom. That will bring up a file explorer. Upload the log file so we can take a look.

 

It seems the INDI web manager either doesn't start EQMod driver or it crashes, I haven't used the web manager so I don't know if it shows a log somewhere, but you could also try to start the drivers either manually from command line (command "indiserver -v indi_asi_ccd indi_eqmod_telescope") or via KStars/Ekos to see if they show any more debug info why it doesn't start.

 
That is the log file.

That's the KStars log, which doesn't help here as it only sees the ASI driver, not EQMod. Would need logs from the INDI server why starting the EQMod driver fails.

That is another file . I think it reads something about EQmod mount . 

That one is similar, the only mention of EQMod is that your Ekos profile correctly expects the EQMod mount, but the INDI server doesn't have one as it hasn't loaded the driver (or it has crashed). As said, we need the log from INDI server itself to see why. The INDI web manager probably does one somewhere as it starts the INDI server, but I haven't used it so don't know where. When running the INDI server manually from command line, you get it directly on the console.

".....When running the INDI server manually from command line, you get it directly on the console......"   How can I do this ?

Make sure the indiserver started by INDI web manager is stopped first and then run command "indiserver -v indi_asi_ccd indi_eqmod_telescope"

If you get an error about not being able to bind the port, that means the other server is still running.

I get this in the command prompt:
astroberry@astroberry:~ $ sudo indiserver -v indi_asi_ccd indi_eqmod_telescope
[sudo] password for astroberry:
2021-08-08T23:12:43: startup: indiserver -v indi_asi_ccd indi_eqmod_telescope
2021-08-08T23:12:43: Driver indi_asi_ccd: pid=2246 rfd=3 wfd=6 efd=7
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2247 rfd=4 wfd=9 efd=10
2021-08-08T23:12:43: listening to port 7624 on fd 5
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2247 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #1
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2248 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
Child process 2248 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #2
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2251 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on Telescope Simulator.EQUATORIAL_EOD_COORD
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on Telescope Simulator.TELESCOPE_INFO
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on Telescope Simulator.GEOGRAPHIC_COORD
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on Telescope Simulator.TELESCOPE_PIER_SIDE
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on Rotator Simulator.ABS_ROTATOR_ANGLE
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on Focuser Simulator.ABS_FOCUS_POSITION
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on Focuser Simulator.FOCUS_TEMPERATURE
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on CCD Simulator.FILTER_SLOT
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on CCD Simulator.FILTER_NAME
2021-08-08T23:12:43: Driver indi_asi_ccd: snooping on SQM.SKY_QUALITY
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2251 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #3
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2252 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #4
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2253 rfd=0 wfd=9 efd=10
Child process 2252 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2253 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #5
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2254 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2254 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #6
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2255 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2255 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #7
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2256 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2256 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #8
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2257 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #9
Child process 2257 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2258 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2258 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: restart #10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: pid=2259 rfd=0 wfd=9 efd=10
2021-08-08T23:12:43: Driver indi_eqmod_telescope: indi_eqmod_telescope: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libindidriver.so.1: undefined symbol: ISSnoopDevice
2021-08-08T23:12:43: Driver indi_eqmod_telescope: stderr EOF
Child process 2259 died
2021-08-08T23:12:43: Driver indi_eqmod_telescope: Terminated after #10 restarts.
2021-08-08T23:12:53: Client 0: new arrival from 127.0.0.1:48770 - welcome!

Thanks, that explains the cause, the EQMod driver is compiled against a different version of the main INDI library than is installed in your system. So one or the other has been upgraded since it started before the reboot.

To fix that you could either see if there are more upgrades available which might bring them in sync or rollback to an earlier version somehow or compile both the INDI library and drivers yourself which guarantees they are compatible.

Btw. no need to run indiserver as root with sudo, regular user works too.