Error message while trying to pair an android tablet with my Linux PC

I have a new android tablet (Samsung Galaxy Tab S6 Lite) and I have been able to pair it once with my computer (after un-pairing it with my previous tablet). But the pairing was lost somehow and now that I’m trying to pair both devices again, step 4 of the sync process is interrupted and I get the following message (I have copied it from my tablet):

MSG: Transaction is not started yet, start transaction before committing or rolling it back.
NAME: TransactionNotStartedError
STACK: n@index.android.bundle:804:185
index.android.bundle:872:1444
s@index.android.bundle:774:2990
index.android.bundle:774:2291
index.android.bundle:774:1981
c@index.android.bundle:125:205
b@index.android.bundle:125:1623
_@index.android.bundle:125:488
l@index.android.bundle:774:1773
commitTransaction@index.android.bundle:872:1285
index.android.bundle:846:2314
s@index.android.bundle:774:2990
index.android.bundle:774:2291
l@index.android.bundle:774:1814
f@index.android.bundle:125:155
index.android.bundle:125:882
y@index.android.bundle:130:661
C@index.android.bundle:130:1025
callImmediates@index.android.bundle:130:3100
callImmediates@[native code]
value@index.android.bundle:45:3238
index.android.bundle:45:1274
value@index.android.bundle:45:2930
value@index.android.bundle:45:1244
value@[native code]
value@[native code]

1) Which browser, operating system and versions of those are you using?
I’m using Ubuntu 20.04 and Firefox 84.0.2. I have also disabled the WebRTC shield (which has been indicated as preventing the QR code from launching properly at the beginning of the pairing process).

2) Which version of Memex are you running?
Memex 2.12.2

3) What are the steps you took that lead to the bug?
I just followed the steps indicating for pairing my two devices. I really strictly followed every steps.