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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
checkmark multiple files an move them to a new folder - only a single file will be moved
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
nextcloud 2.0.7 (snap version)
Nextcloud version 20.0.7
Operating system and version Linux ts 4.19.0-14-amd64 #1 SMP Debian 4.19.171-2 (2021-01-30) x86_64
The issue you are facing:
there is only one file moved
Is this the first time you’ve seen this error? (Y/N):
Steps to replicate it:
- select multiple files and move them to a newly created folder