Please refer to below mentioned link or follow the steps mentioned here.

Issue:

When you try to access the photoshop->preferences->performance menu it displays the following error : "Invalid Numeric Entry: an integer between 96 and 8 is required". It will not launch the performance settings tab. Tools such as blur, liquify etc which make use of GPU are also impacted.

Operating System:

Windows 10 Creators Update and above.

Note:

Users have reported this issue post installing the creators update on Windows 10.

Workaround:

Our engineers are working on a solution for this issue.

Note:

The following workaround is for customers who are comfortable with modifying their registry. If these types of instructions are unfamiliar or confusing to you, please contact support for help: 

Contact Customer Care

• Press the Windows and "r" key simultaneously to bring up the run window.
• Type regedit and press enter.
• Navigate to HKEY_CURRENT_USER\Software\Adobe\Photoshop\120.0
• Right click on 120.0 and create a new DWORD.

• Rename the DWORD value to "OverridePhysicalMemoryMB".
• Right click on it and select modify.
• Change the base value from "hexadecimal" to "decimal".
• Change the value data from "0" to "24000".

Note:

Take a backup of the registry, prior to making any changes.

Please let us know if issue persists.

Best Regards,

Amit Kaushal