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Resolved Unable to access Backup manager

Server operating system version
Centos 7.9
Plesk version and microupdate number
18.0.53
I get this error
Failed to parse response. Reason: Failed to read data from stream Process output:
I tried to plesk repair all
Still not working
Linux Obsidian 18.0.53 Centos 7.9

The command
/usr/local/psa/admin/bin/pmmcli --get-tasks-list Backup
Outputs:
Traceback (most recent call last):
File "/usr/local/psa/admin/sbin/pmmcli/.bootstrap/_pex/pex.py", line 332, in execute
File "/usr/local/psa/admin/sbin/pmmcli/.bootstrap/_pex/pex.py", line 262, in _wrap_coverage
File "/usr/local/psa/admin/sbin/pmmcli/.bootstrap/_pex/pex.py", line 294, in _wrap_profiling
File "/usr/local/psa/admin/sbin/pmmcli/.bootstrap/_pex/pex.py", line 375, in _execute
File "/usr/local/psa/admin/sbin/pmmcli/.bootstrap/_pex/pex.py", line 433, in execute_entry
File "/usr/local/psa/admin/sbin/pmmcli/.bootstrap/_pex/pex.py", line 438, in execute_module
File "/usr/local/lib/python3.6/runpy.py", line 208, in run_module
return _run_code(code, {}, init_globals, run_name, mod_spec)
File "/usr/local/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/usr/local/psa/admin/sbin/pmmcli/pmmcli.py", line 18, in <module>
File "/usr/local/psa/admin/sbin/pmmcli/pmm_task.py", line 12, in <module>
File "/usr/local/lib/python3.6/sqlite3/__init__.py", line 23, in <module>
from sqlite3.dbapi2 import *
File "/usr/local/lib/python3.6/sqlite3/dbapi2.py", line 27, in <module>
from _sqlite3 import *
ModuleNotFoundError: No module named '_sqlite3'


1686310330062.png
 
Hi Peter,
Thank you for your response
I installed sqlite-devel, then reconfigured python3.6.8 and the problem was resolved
The command /usr/local/psa/admin/bin/pmmcli --get-tasks-list Backup returned the expected XML response.
Possible collateral damages: Some websites crashed (httpd) so I repaired Plesk
  • plesk repair installation
  • plesk repair web
I hope this can be useful.
 
A friend experienced this error when installing additional python version 3.9.6 and switched default python3 to it.
The backup manager stopped then.
I think the backup manager depends on 3.6 version or maybe python 2.
 
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