I made the new update and received this

Osclass v8.0.0


[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Fatal error:  Uncaught Error: Call to a member function row() on boolean in /home/pgnro/public_html/oc-includes/osclass/model/Item.php:1363
Stack trace:
#0 /home/pgnro/public_html/oc-includes/osclass/model/Search.php(1130): Item->extendData(Array)
#1 /home/pgnro/public_html/oc-includes/osclass/controller/search.php(521): Search->doSearch()
#2 /home/pgnro/public_html/index.php(108): CWebSearch->doModel()
#3 {main}
  thrown in /home/pgnro/public_html/oc-includes/osclass/model/Item.php on line 1363
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Warning:  mysqli::query(): (08S01/1053): Server shutdown in progress in /home/pgnro/public_html/oc-includes/osclass/classes/database/DBCommandClass.php on line 957
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Warning:  Error while sending QUERY packet. PID=973472 in /home/pgnro/public_html/oc-includes/osclass/classes/database/DBCommandClass.php on line 957
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Warning:  mysqli::query(): MySQL server has gone away in /home/pgnro/public_html/oc-includes/osclass/classes/database/DBCommandClass.php on line 957
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Warning:  mysqli::query(): Error reading result set's header in /home/pgnro/public_html/oc-includes/osclass/classes/database/DBCommandClass.php on line 957
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Warning:  mysqli::query(): MySQL server has gone away in /home/pgnro/public_html/oc-includes/osclass/classes/database/DBCommandClass.php on line 957
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Warning:  mysqli::query(): Error reading result set's header in /home/pgnro/public_html/oc-includes/osclass/classes/database/DBCommandClass.php on line 957
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Fatal error:  Uncaught Error: Call to a member function result() on boolean in /home/pgnro/public_html/oc-includes/osclass/model/Item.php:1309
Stack trace:
#0 /home/pgnro/public_html/oc-includes/osclass/model/Search.php(1130): Item->extendData(Array)
#1 /home/pgnro/public_html/oc-includes/osclass/controller/search.php(521): Search->doSearch()
#2 /home/pgnro/public_html/index.php(108): CWebSearch->doModel()
#3 {main}
  thrown in /home/pgnro/public_html/oc-includes/osclass/model/Item.php on line 1309
[08-Nov-2021 14:23:53 Europe/Bucharest] PHP Fatal error:  Uncaught Error: Call to a member function result() on boolean in /home/pgnro/public_html/oc-includes/osclass/model/Item.php:1309
Stack trace:
#0 /home/pgnro/public_html/oc-includes/osclass/model/Search.php(1160): Item->extendData(Array)
#1 /home/pgnro/public_html/oc-includes/osclass/helpers/hPremium.php(48): Search->getPremiums('3')
#2 /home/pgnro/public_html/oc-content/themes/gamma/search_gallery.php(10): osc_get_premiums('3')
#3 /home/pgnro/public_html/oc-content/themes/gamma/search.php(400): require('/home/pgnro/pub...')
#4 /home/pgnro/public_html/oc-includes/osclass/helpers/hDefines.php(363): require('/home/pgnro/pub...')
#5 /home/pgnro/public_html/oc-includes/osclass/controller/search.php(702): osc_current_web_theme_path('search.php')
#6 /home/pgnro/public_html/oc-includes/osclass/controller/search.php(634): CWebSearch->doView('search.php')
#7 /home/pgnro/public_html/index.php(108): CWebSearch->doModel()
#8 {main}
  thrown in /home/pgnro/public_html/oc-includes/osclass/model/Item.php on line 1309

It sounds like database issue. Do not see any relation to update or osclass version.
MySQL server has gone away in

can it be repaired?

@Marius
If your database went down for some reason, you should identify reason.
Of course, if this happens often and is not just 1 time log.

 8)thanks again best support