the virtual texturing is turned on , gives error and doesnt allow loading of more than 1 tile ,the texture was tested in 5.5.4 where it worked just fine
Is virtual texture setting turned on in project setting? if no enable it, if yes then open the texture(s) if more than 1 udim use property matrix to batch edit texture setting then enable virtual streaming, hope that helped.
as it says in the first sentence the virtual texturing is turned on in project settings , and on the texture importing the setting for virtual streaming is on , the texture shows up as a 4 udim texture in the viewport but when applied to shader only the first tile loads on the model ,and it shows the warning in the viewport of the tex preview its not something that is not ticked on this is something wrong with the engine not loading the udims in 5.6 as ive said in 5.5.4 with proper settings every udim loaded properly
Apology for late reply as I was busy with my plugin update and getting 5.6 to compile successfully, I just tested in 5.6 and it does give the error when you open the texture however it looks correct on the model as can be seen below, for context I used my plugin to convert multiple material mesh into 1 material using UDIMs.
it does look correct on some models but doesnt on others
This definitely looks like a bug. Seems like the checkbox that enables Virtual Texture Support for Mobile does it for the entire project instead.
This is disabled by default for Mobile, but enabling it fixes the problem, at least it did for me 
hope it helps
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Would be cool if that fixed it. Im gonna give that a shot too. There is another way to fix them by adjusting the “padding and resizing” type for each texture ( setting it to “stretch to square power of two” works well ). No idea why they broke it that much in 5.6. . The yellow warning messages don’t actually mean anything as per usual. Can just ignore those.
small update: enabeling mobile support didnt fix it for me, but changing the “padding and resizing” should work for anyone having weird scaling issues after importing.
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