diff --git a/launcher/minecraft/mod/ResourceFolderModel.h b/launcher/minecraft/mod/ResourceFolderModel.h
index d763bec3..5652c156 100644
--- a/launcher/minecraft/mod/ResourceFolderModel.h
+++ b/launcher/minecraft/mod/ResourceFolderModel.h
@@ -257,8 +257,11 @@ void ResourceFolderModel::applyUpdates(QSet<QString>& current_set, QSet<QString>
             // If the resource is resolving, but something about it changed, we don't want to
             // continue the resolving.
             if (current_resource->isResolving()) {
-                auto task = (*m_active_parse_tasks.find(current_resource->resolutionTicket())).get();
-                task->abort();
+                auto ticket = current_resource->resolutionTicket();
+                if (m_active_parse_tasks.contains(ticket)) {
+                    auto task = (*m_active_parse_tasks.find(ticket)).get();
+                    task->abort();
+                }
             }
 
             m_resources[row].reset(new_resource);
@@ -285,8 +288,11 @@ void ResourceFolderModel::applyUpdates(QSet<QString>& current_set, QSet<QString>
             Q_ASSERT(removed_set.contains(removed_it->get()->internal_id()));
 
             if ((*removed_it)->isResolving()) {
-                auto task = (*m_active_parse_tasks.find((*removed_it)->resolutionTicket())).get();
-                task->abort();
+                auto ticket = (*removed_it)->resolutionTicket();
+                if (m_active_parse_tasks.contains(ticket)) {
+                    auto task = (*m_active_parse_tasks.find(ticket)).get();
+                    task->abort();
+                }
             }
 
             beginRemoveRows(QModelIndex(), removed_index, removed_index);