Odoo Server Error

Traceback (most recent call last):

  File "/opt/odoo/odoo-server/odoo/addons/base/models/qweb.py", line 334, in _compiled_fn

    return compiled(self, append, new, options, log)

  File "", line 1, in template_mrp_report_mrporder_271

  File "", line 552, in foreach_270

  File "", line 1, in foreach_269

  File "/opt/odoo/mrp_tweaks/mrp_work_order_print_tweaks/models/mrp_production.py", line 27, in string2pdf

    subprocess.check_output(

  File "/usr/local/lib/python3.8/subprocess.py", line 411, in check_output

    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,

  File "/usr/local/lib/python3.8/subprocess.py", line 512, in run

    raise CalledProcessError(retcode, process.args,

subprocess.CalledProcessError: Command 'find /opt/odoo/odoo-server/odoo/../addons/web/static/src/img/tmp_mwop_* -mtime +2 -exec rm {} \;' returned non-zero exit status 1.

During handling of the above exception, another exception occurred:

Other PDF's work just fine and we did try a reboot incase. Nothing on the server or application has changed, any help would be great. Thakn you