@ suphamster
I have 2 UA's Maxthon standard and and different one in a UA spoofer extension. I use the spoofer one most of the time and just switch off the extension when required (Youtube for example).
It's because Chrome has moved to manifest 3 and Maxthon is still on Manifest 2.
Have you tried this one
https://chromewebstore.google.com/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm
This is Distrowatch for me using this UA
Mozilla/5.0 (compatible; Windows NT 10.0; WOW64; IA64; en) AppleWebKit/599.0+ Maxthon/7.2 Chrome/128.0.6513.138 Safari/537.36 OPR/113.5230.86 QupZilla/2.2.6 Edge/128.0.2739.79
Changing the UA can break sites i.e Youtube see https://forum.maxthon.com/index.php?/topic/25261-mx-7-mx-6-mx-5-updated-user-agent/
it can also "Open" impossible to access sites. The real problem is the outdated MX core.
It's because Chrome has moved onto Manifest 3 and Maxthon is still on Manifest 2.
Try installing this
https://www.majorgeeks.com/files/details/majorgeeks_enable_manifest2_policy.html
Both sites work well here using this UA
Mozilla/5.0 (compatible; Windows NT 10.0; WOW64; IA64; en) AppleWebKit/599.0+ Maxthon/7.2 Chrome/128.0.6513.138 Safari/537.36 OPR/113.5230.86 QupZilla/2.2.6 Edge/128.0.2739.79
Distrowatch works with this UA as well
Mozilla/5.0 (compatible; Windows NT 10.0; WOW64; IA64; en) AppleWebKit/599.0+ Maxthon/7.2 Chrome/128.0.6513.120 Safari/537.36 OPR/113.5230.62 QupZilla/2.2.6 Edge/128.0.2739.67
Chrome has moved to Manifest 3 Maxthon is on Manifest 2
Try installing this
https://www.majorgeeks.com/files/details/majorgeeks_enable_manifest2_policy.html
For extensions. Open extensions page in Maxthon. Switch on Developer mode at top of page. Click on update.
What extension are you running scripts on Tampermonkey for example?
Also in Maxthon go to Settings/Advanced/More Settings (More Custom Features (Laboratory)/User agent String.
Select Customised and put this in
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36