Fix error handling when checking for 3Box backup (#7232)

The 3Box SDK throws an HTTP 404 error when attempting to get the config
for an account that doesn't yet exist in 3Box. The regex we were using
to differentiate this error from others was broken. This ended up
preventing the user from logging in if they had 3Box enabled but hadn't
yet synced.

The regex has been corrected to catch this case, while allowing other
errors to propogate upward. Other 3Box errors will now be caught and
reported rather than interrupting login completely.

At some point in the future, we should expose these errors to the user
in some way, and allow them to retry in case 3Box was just temporarily
offline.

app/scripts/controllers/threebox.js

@@ -118,7 +118,7 @@ class ThreeBoxController {
       const threeBoxConfig = await Box.getConfig(this.address)
       backupExists = threeBoxConfig.spaces && threeBoxConfig.spaces.metamask
     } catch (e) {
-      if (e.message.match(/^Error: Invalid response (404)/)) {
+      if (e.message.match(/^Error: Invalid response \(404\)/)) {
         backupExists = false
       } else {
         throw e

app/scripts/metamask-controller.js

@@ -754,12 +754,16 @@ module.exports = class MetamaskController extends EventEmitter {
     await this.preferencesController.syncAddresses(accounts)
     await this.txController.pendingTxTracker.updatePendingTxs()
 
-    const threeBoxSyncingAllowed = this.threeBoxController.getThreeBoxSyncingState()
-    if (threeBoxSyncingAllowed && !this.threeBoxController.box) {
-      await this.threeBoxController.new3Box()
-      this.threeBoxController.turnThreeBoxSyncingOn()
-    } else if (threeBoxSyncingAllowed && this.threeBoxController.box) {
-      this.threeBoxController.turnThreeBoxSyncingOn()
+    try {
+      const threeBoxSyncingAllowed = this.threeBoxController.getThreeBoxSyncingState()
+      if (threeBoxSyncingAllowed && !this.threeBoxController.box) {
+        await this.threeBoxController.new3Box()
+        this.threeBoxController.turnThreeBoxSyncingOn()
+      } else if (threeBoxSyncingAllowed && this.threeBoxController.box) {
+        this.threeBoxController.turnThreeBoxSyncingOn()
+      }
+    } catch (error) {
+      log.error(error)
     }
 
     return this.keyringController.fullUpdate()