diff --git a/.templates/01-custom_script.sh b/.templates/01-custom_script.sh
index 472bab4ee..c713713f2 100755
--- a/.templates/01-custom_script.sh
+++ b/.templates/01-custom_script.sh
@@ -16,7 +16,7 @@ if [ -f /config/addons_autoscripts/"${slug}".sh ]; then
     bashio::log.info "... script found, executing"
     # Convert scripts to linux
     dos2unix /config/addons_autoscripts/"${slug}".sh || true
-    chmod +x /config/addons_autoscripts/"${slug}".sh
+    chmod +x /config/addons_autoscripts/"${slug}".sh || true
     /./config/addons_autoscripts/"${slug}".sh
 else
     bashio::log.info "... no script found"
diff --git a/portainer_agent/config.json b/portainer_agent/config.json
index a71690b1e..0c098a6b9 100644
--- a/portainer_agent/config.json
+++ b/portainer_agent/config.json
@@ -30,7 +30,7 @@
     "9001/tcp": "Portainer agent"
   },
   "schema": {
-    "AGENT_CLUSTER_ADDR": "str",
+    "AGENT_CLUSTER_ADDR": "str?",
     "AGENT_CLUSTER_PROBE_INTERVAL": "str?",
     "AGENT_CLUSTER_PROBE_TIMEOUT": "str?",
     "AGENT_SECRET": "str?",