after the crash I am often able to start in safe mode. I uninstalled and then reinstalled libreoffice, but it didn’t help.
Did you try resetting the User profile? [Tutorial] User profile
If my answer helped you, vote it with 
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    after the crash I am often able to start in safe mode. I uninstalled and then reinstalled libreoffice, but it didn’t help.
Did you try resetting the User profile? [Tutorial] User profile
If my answer helped you, vote it with 
 (here on the left)