params wrongly seperated: movePage
Result for action=move&format=json&assert=botmaxlag=5&from=Selenium+Echo+link+test+0.7641617008345213+0.7641617008345213&to=Selenium+Echo+link+test+0.7641617008345213+0.764161700834521&reason=test&bot=0&movetalk=0&noredirect=0&token=610ac57ce10bf82c412600dc05b360715a4580de%2B%5C:
'{"error":{"code":"unknown_assert","info":"Unrecognized value for parameter \"assert\": botmaxlag=5.","*":"See https://en.wikipedia.beta.wmflabs.org/w/api.php for API usage. Subscribe to the mediawiki-api-announce mailing list at <https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce> for notice of API deprecations and breaking changes."},"servedby":"deployment-mediawiki05"}'
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information