diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index fdeb541..36754dd 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -30,10 +30,10 @@ spring.freemarker.allow-request-override=true
 spring.freemarker.allow-session-override=true
 spring.freemarker.settings.template_exception_handler=ignore
 
-multipart.maxFileSize=20Mb
-multipart.maxRequestSize=20Mb
-spring.http.multipart.maxFileSize=20Mb
-spring.http.multipart.maxRequestSize=20Mb
+multipart.maxFileSize=50Mb
+multipart.maxRequestSize=50Mb
+spring.http.multipart.maxFileSize=50Mb
+spring.http.multipart.maxRequestSize=50Mb
 
 spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
 spring.data.rest.page-param-name=page
diff --git a/src/main/resources/templates/admin/business/process-edit.ftl b/src/main/resources/templates/admin/business/process-edit.ftl
index c48ed8e..f960a84 100644
--- a/src/main/resources/templates/admin/business/process-edit.ftl
+++ b/src/main/resources/templates/admin/business/process-edit.ftl
@@ -903,7 +903,7 @@
                     else if (value instanceof Array) {
                       return value.length === 0
                     }
-                    return value != null || value !== undefined
+                    return value == null || value === undefined
                   }
 
                   const containsEmpty = detail => {
diff --git a/src/main/resources/templates/admin/business/process-new.ftl b/src/main/resources/templates/admin/business/process-new.ftl
index 765b34f..03b5e4d 100644
--- a/src/main/resources/templates/admin/business/process-new.ftl
+++ b/src/main/resources/templates/admin/business/process-new.ftl
@@ -1059,7 +1059,7 @@
                     else if (value instanceof Array) {
                       return value.length === 0
                     }
-                    return value != null || value !== undefined
+                    return value == null || value === undefined
                   }
 
                   const containsEmpty = detail => {