Popup error keeps on showing after saving trap setup

[Vainglory07]

1. I tried to save trap setup A
2. Then Edit trap setup B to reposition it using the down, up arrows
3. Saved trap setup B
4. Popup error starts showing after refreshing the page
5. The UI to add trap setup is gone too (hidden), and just shows the popup error with the log below:

s is null

src/modules/favorite-setups/index.js/getNameOfCurrentSetup/setup<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:22973:11
getNameOfCurrentSetup@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:22972:30
addFavoriteSetupsButton@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:23002:27
src/modules/favorite-setups/index.js/init29/<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:23022:9
__async/mhui<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:72:63
__async@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:56:12
init29@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:23020:29
src/index.js/loadModules/<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:36633:35
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:26
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:15
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
__async/mhui<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:72:11
__async@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:56:12
loadModules@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:36582:38
src/index.js/init74/<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:36699:17
fulfilled@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:59:26
promise callback*step@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:71:78
__async/mhui<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:72:11
__async@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:56:12
init74@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:36654:33
src/index.js@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:36717:7
__require@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:33:52
mhui<@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:36720:10
@moz-extension://942fecd0-fe45-44e9-b86e-28e84e097d14/main.js:36721:3