Issue ModuleNotFoundError: pymysql

[se2e-dev]

Server operating system version

Debian 12.14

Plesk version and microupdate number

18.0.78 Update 4

For the past few days, I’ve been getting the following error every morning in the Plesk log:

2026-06-29 06:32:12
ERR
panel [945521:6a41f54c125da]
Command returned non-zero exit code.

Command: 'plesk-migrator' 'summarize-statistics' '--quiet'

Exit code: 1

stdout:


stderr:
Traceback (most recent call last):
  File "/opt/psa/admin/sbin/modules//site-import/plesk-migrator", line 41, in <module>
    from parallels.core.cli.migration_cli import run
  File "/usr/local/psa/admin/plib/modules/site-import/backend/lib/python/parallels/core/cli/migration_cli.py", line 21, in <module>
    from parallels.core.utils.windows_agent_remote_object import RPCAgentBuilder
  File "/usr/local/psa/admin/plib/modules/site-import/backend/lib/python/parallels/core/utils/windows_agent_remote_object.py", line 21, in <module>
    from parallels.core.utils.plesk_utils import get_windows_util_path
  File "/usr/local/psa/admin/plib/modules/site-import/backend/lib/python/parallels/core/utils/plesk_utils.py", line 4, in <module>
    import pymysql
ModuleNotFoundError: No module named 'pymysql'

I’m not running any migration, so I’m not sure why this is happening. Other than this, Plesk seems to be working normally.

Has anyone seen this before or knows what could be causing it?

Thanks in advance!

 

[Sebahat.hadzhi]

Hi, @se2e-dev . Please reinstall the extension and let us know if the error reoccurs.

 

[se2e-dev]

Hi,

I reinstalled the extension yesterday, but this morning the same error appeared again.

The error still occurs with:

Command: 'plesk-migrator' 'summarize-statistics' '--quiet'
ModuleNotFoundError: No module named 'pymysql'

So reinstalling the extension did not solve the issue.

 

[Sebahat.hadzhi]

Thank you for the confirmation. Could you please confirm the Site Import extension version?

 

[se2e-dev]

The Site Import extension version is 1.11.0-14069.

I assume the issue may have started with version 1.11.0, released on June 22, 2026, because the changelog says:

Updated Python dependencies. (PMT-5681)

The update was probably installed on June 22 or June 23, and the first error appeared on June 24.

So it looks like the issue may be related to this extension update.

 

[scsa20]

More likely not actually installed. Try doing this to make 100% sure:

sudo apt update
sudo apt install python3-pymysql -y
# Do this to install via Plesk's Python pip
sudo /opt/psa/admin/bin/python3 -m pip install pymysql
# If the above pip not work, try the other path
sudo /usr/local/psa/admin/bin/python3 -m pip install pymysql
# Repair and restart
plesk repair all -y
sudo systemctl restart psa
# Test it manually to see if the error goes away
plesk-migrator summarize-statistics --quiet