Fixed Error 500 when adding user to a board and multiple same avatar icons by revert back from Meteor 2.15 to 2.14.

Thanks to xator91 and xet7 !

Fixes #5302,
fixes #5317

.meteor/packages

@@ -43,7 +43,7 @@ random@1.2.1
 reactive-dict@1.3.1
 session@1.2.1
 tracker@1.3.3
-underscore@1.6.0
+underscore@1.0.13
 arillo:flow-router-helpers
 audit-argument-checks@1.0.7
 kadira:dochead
@@ -83,7 +83,7 @@ matb33:collection-hooks
 simple:json-routes
 kadira:flow-router
 spacebars
-service-configuration@1.3.3
+service-configuration@1.3.2
 communitypackages:picker
 minifier-css@1.6.4
 blaze

.meteor/release

@@ -1 +1 @@
-METEOR@2.15
+METEOR@2.14

.meteor/versions

@@ -144,12 +144,12 @@ templating-tools@1.2.2
 tracker@1.3.3
 typescript@4.9.5
 ui@1.0.13
-underscore@1.6.0
+underscore@1.0.13
 url@1.3.2
 useraccounts:core@1.16.2
 useraccounts:flow-routing@1.15.0
 useraccounts:unstyled@1.14.2
-webapp@1.13.8
+webapp@1.13.6
 webapp-hashing@1.1.1
 wekan-accounts-cas@0.1.0
 wekan-accounts-lockout@1.0.0

package-lock.json

@@ -652,9 +652,9 @@
       "integrity": "sha512-8rXg1ZnX7xzy2NGDVkBVaAy+lSlPNwad13BtgSlLuxfIslyt5Vg64U7tFcCt4WS1R0hvtnQybT/IyCkGZ3DpXQ=="
     },
     "flatted": {
-      "version": "3.2.9",
-      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.2.9.tgz",
-      "integrity": "sha512-36yxDn5H7OFZQla0/jFJmbIKTdZAQHngCedGxiMmpNfEZM0sdEeT+WczLQrjK6D7o2aiyLYDnkw0R3JK0Qv1RQ==",
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.3.1.tgz",
+      "integrity": "sha512-X8cqMLLie7KsNUDSdzeN8FYK9rEt4Dt67OsG/DNGnYTSDBG4uFAJFBnUeiV+zCVAvwFy56IjM9sH51jVaEhNxw==",
       "dev": true
     },
     "for-each": {

package.json

@@ -13,7 +13,7 @@
   },
   "homepage": "https://wekan.github.io",
   "devDependencies": {
-    "flatted": "^3.2.2",
+    "flatted": "^3.3.1",
     "sinon": "^13.0.2"
   },
   "dependencies": {