Sadly, all 3 of the New units I bought had the same issue, and it was Intermittent. I can advise the Fastest way to resolve the problem permanently would be to send it to EHX, it should be under Warranty, they fixed mine and it made a Big Difference in using it, it’s much more enjoyable to use now.
Even though it’s a hassle to pack and mail it to NY, it’s WORTH doing. They know exactly what the issue is, I Wish I had sent the 1st unit I bought to them instead of mucking about for 30 days buying and returning the 1st 2 Units.
Hope this helps. Good luck.

It’s worth fixing it properly, EH has had some sort of Assembly problem with these units IMO. I think it comes down to a Grounding issue for the Pots. I am not an electronics expert, but after my own assessments and 3 attempts to buy a working unit and fix mine, this is what my guess was. IF you Push on the pots that seem affected, with mine the Pan Pots also did not function correctly, but by pushing on them I could get them to make contact and work properly until i let go. So I assumed Grounding.

EH fixed and returned it to me, they did NOT explain what they did, and they do NOT charge money to return Units under warranty, but you will have to spend a little just to get it to them. I recommend it.
After buying 3 of them, I feel that all these Units are all subject to this minor production glitch, as so many seem wonky, after this, you should have smooth trouble free FUN.

…hmmm, yes missing screws are annoying and Not a confidence builder, but the 45000 looper is such a great pedal overall, and now that yours has been serviced by EH and working correctly means you can really get to use and enjoy it now.
I’d just email and ask them for a set of screws, and then you’ll be done thinking about it and get on with USING it.

It is true that there is a manufacturing defect in the Units and after getting 3 defective units, I feel that it boils down to a ground issue where the potentiometers are NOT making strong enough contact in these units, and that is possibly a design issue, but they seem to be able to fix them easily enough, it’s just a bad thing that MANY went out this way.
I am sure some users are not even aware of the issues, on mine they were intermittent, but mostly they did Not function correctly “if” you are paying attention.
I wouldn’t condemn all EH products or the company, they do make and design great things and these glitch’s just happen in manufacturing… luckily easily fixed, albeit at a small shipping cost to return our units to them, but in the big picture, if this is our biggest problem, then life isn’t so bad IMO… Enjoy.