[EDIT]
One by one optimization is working fine but not for bulk optimization
Hello.
What type of optimization are you running? which button do you click in the optimization window?
Bulk Optimization button
For more details please find the below screenshot:
https://prnt.sc/208rim5
Im using WordPress 5.8.2
Regards,
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This reply was modified 4 years, 6 months ago by
shoptak.
Lossless optimization
Please find the below error message from Firefox Dev once i Clicked on Optimize
https://prnt.sc/2092t3h
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This reply was modified 4 years, 6 months ago by
shoptak.
Try it in another browser.
Before that, no one had any problems with running optimization