XF 2.1 Error due to Mysqli? recently upgraded the forum

[Deleted member 136029]

[12-Feb-2019 16:06:19 UTC] PHP Fatal error:  Uncaught XF\Db\Exception: No such file or directory in /home/tamilfor/public_html/src/XF/Db/Mysqli/Adapter.php:160
Stack trace:
#0 /home/tamilfor/public_html/src/XF/Db/Mysqli/Adapter.php(28): XF\Db\Mysqli\Adapter->makeConnection(Array)
#1 /home/tamilfor/public_html/src/XF/Db/AbstractAdapter.php(60): XF\Db\Mysqli\Adapter->getConnection()
#2 /home/tamilfor/public_html/src/XF/Db/Mysqli/Adapter.php(113): XF\Db\AbstractAdapter->connect()
#3 /home/tamilfor/public_html/src/XF/Db/AbstractAdapter.php(467): XF\Db\Mysqli\Adapter->escapeString('options')
#4 /home/tamilfor/public_html/src/XF/Db/AbstractAdapter.php(445): XF\Db\AbstractAdapter->quote('options')
#5 /home/tamilfor/public_html/src/XF/DataRegistry.php(138): XF\Db\AbstractAdapter->quote(Array)
#6 /home/tamilfor/public_html/src/XF/DataRegistry.php(83): XF\DataRegistry->readFromDb(Array, Array)
#7 /home/tamilfor/public_html/src/XF/DataRegistry.php(226): XF\DataRegistry->get(Array)
#8 /home/tamilfor/public_html/src/XF/App.php(1643): XF\DataRegistry->offsetGet('opti in /home/tamilfor/public_html/src/XF/Db/Mysqli/Adapter.php on line 160

3 days back i upgraded my forum from 1.5 to 2.1.0, accessing site is no issue but error_log file shows this.

 

[Thangvip9x]

It's same
Please help me

 

[Thangvip9x]

I using php 7.3

 

[V3NTUS]

Me too, but I upgraded from 2.0.x to 2.1.x instead.