Mate - I have the same issue. Same amp and pedel. Awful documentation - such a joke on all of their kit TBH.
Also have you tried using the pedle for the looper? I don't think it is compatable and there is no instruction on how it works. On the website it says,
"When paired with most Line 6 guitar amplifiers, the footswitches also give you total control of Quick Loop, the amps' built-in 14-second sound-on-sound looper." MOST Line 6 amps."
On the compatability chart it just mentions Spider 5 (not Spider 5 MK2). I've sent a ticket to tech to see if it IS compatible with the MK2. If not why not make that ABUNDANTLY clear on the site. Some of us do not even know there was a Spider V before a Spider V MK". And why name the pedle MK" if it doen't work with a MK2 amp? What a waste of time.
If you bought from a company, you may be able to return it and refunded...that's what I will try.
Customer Contracts Regulations 2014
Under new consumer regulations, if you purchase your product from us over the phone or online you have the right to cancel the order without any given reason as long as you contact us within 14 days of receiving your complete order. All items must be returned to us in ‘as new or showroom’ condition meaning they should show no signs of use, wear and tear or damage.
Latest android (13) does not work with ther Spider Remote app for the amp either (came out August 2022). WIll vote with my feet on this company I think!