error - too many connections

hi,
I get this error

Code:

XF\Db\Exception: Too many connections src/XF/Db/Mysqli/Adapter.php:165
Generated by: Unknown account Jul 18, 2022 at 4:43 PM
Stack trace
#0 src/XF/Db/Mysqli/Adapter.php(28): XF\Db\Mysqli\Adapter->makeConnection(Array)
#1 src/XF/Db/AbstractAdapter.php(62): XF\Db\Mysqli\Adapter->getConnection()
#2 src/XF/Db/Mysqli/Adapter.php(113): XF\Db\AbstractAdapter->connect()
#3 src/XF/Db/AbstractAdapter.php(518): XF\Db\Mysqli\Adapter->escapeString('addOnsComposer')
#4...

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