Problems root patching OCLP and updating MacOS

Today I wanted to update my 2017 MBA but always short before the end of the update it just stops working and displays 35 minutes remaining without any progress. Then I tried root patching OCLP but it always stops at the mount root volume displaying „Failed to mount root volume, cannot continue witch patching!!!“. What is the problem and how can I solve this?

submitted by /u/Fair-Buy1211
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