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nRF Connect SDK v3.4.1 and Nordic Thingy 91 doesn't work correctly with Linux Elementary OS 5.1.6 Hera

Hello.

I have trouble to run the nRF Connect SDK v.3.4.1 on my Linux Elementary OS.

First problem shows up when you try to clone the nRF and you want to insert the sourcecode_root folder on the right side. Everytime you click on the field for your data path your mouse pointer gets frozen and you can't click and scroll any more. The only thing that is still working is the x to close the program.

The second problem occures when I want to update the firmware on my thingy 91. I've downloaded the latest firmware version and I can open the programmer. The device is in the correct MCUboot mode. I select the device and then I should click on "update modem" as suggested in the manual but if I click on this field nothing happens. I can see an untitled window in my dock but I can't open this window, nothing happens basically.
Then I tried to use the "add HEX file" button at the top but if I click on "browse" nothing happens as usual. Usually there should be a windows which pops up...

After that I extracted the zip file manually in my downloads folder and searched for the correct HEX file so that I can insert it in the nRF Connect SDK via drag&drop. If I do it like that then I get a green block in the file memory layout which is good when I continue and want to write this HEX file there is an error which says:"

Status not started. MCUboot DFU failed. Error occured when program. Errorcode: CouldNotOpenDevice(0x4) Lowlevel error: Unknown value (ffffff8e) " I have no idea what this means.

If I click write again after the error the nRF Connect SDK crashes and I just get a white window.

Did someone had the same problems? Are there any solutions to fix this mess up?

Best regards

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