Unable to change Default Tax Rate of the product after update to 20.0.2

After 20.0.2 update, we are receiving blank screen when we try to change default tax rate of the product.

what can you see in the webserver log and in the dolibarr.log file (possibly more useful if you enable debug logging, try visiting this page and then switch off debug logging

Fatal error: Uncaught TypeError: Unsupported operand types: string * int in /product/class/product.class.php:2378 Stack trace: #0 /product/price.php(223): Product->updatePrice() #1 {main} thrown in /product/class/product.class.php on line 2378
Is it helpful for you??

which PHP version are you using?

see it here:

top menu: Home
left menu: Admin Tools, About PHP

PHP version - 8.1.31

@sribalaji.tvn I think you should file a bug report here

please include dolibarr and php version as well as the picture of the error

Fixed in V21.0.0
Thank you