first upload all files

Modules/Slider/Resources/lang/en/attributes.php

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+<?php
+
+return [
+    'caption_1' => 'Caption 1',
+    'caption_2' => 'Caption 2',
+    'direction' => 'Direction',
+    'call_to_action_text' => 'Call to Action Text',
+    'call_to_action_url' => 'Call to Action URL',
+    'open_in_new_window' => 'Open in new window',
+    'caption_1_delay' => 'Delay',
+    'caption_1_effect' => 'Effect',
+    'caption_2_delay' => 'Delay',
+    'caption_2_effect' => 'Effect',
+    'call_to_action_delay' => 'Delay',
+    'call_to_action_effect' => 'Effect',
+    'name' => 'Name',
+    'speed' => 'Speed',
+    'autoplay' => 'Autoplay',
+    'autoplay_speed' => 'Autoplay Speed',
+    'fade' => 'Fade',
+    'dots' => 'Dots',
+    'arrows' => 'Arrows',
+];