I have had the same problem but I was able to migrate my site successfully after doing the following.
go to WpVivid backup plugin > Settings > Advanced settings and increase the following by double the amount it already has. In my case I set the values which are in brackets
PHP script execution timeout for backup (1800) PHP script execution timeout for restore (3600) PHP Memory Limit for backup (512) PHP Memory Limit for restoration (512)
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