Why the wordpress plugin duplicator began to issue 500-504 errors?

Good afternoon. A few weeks ago on different websites which are located on different hosts when you try to create a backup of the plugin duplicator to give you 500, 504 Internal Server error. Backups prior to the error do not have time to create. The plugin never updated WordPress somewhere update itself, somewhere in there. All the different versions, but all do not work EN masse. I tried to change the value of max_execution_time but not affected. Do not even know where to dig.
June 10th 19 at 16:12
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June 10th 19 at 16:14
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