Null Reference Exception

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a video that says black midi reference on it
a robot is holding a red first aid kit with a cross on it
a subscribe button on a green screen
a cartoon character with green hair and a yellow hat is holding a microphone .
a cartoon boy is holding a flashlight in his hand in a dark room .
a screenshot of a cambridge university press website
a stick figure is carrying a large rock with the words `` high expectations '' written on it .
a screenshot of a phone screen that says ajouter une photo at the top
a group of minecraft characters standing next to each other with the words " мы " written on the bottom
a poster for quest quality & excellence activities follow up
    a girl is walking a small dog on a leash with the word berke on the bottom right
    a sign that says playstation 3 firmware update 4.90 on it
    a scatter plot of a number of numbers on a white background with a few red dots .
    a detector is shown next to a red and a blue wave
    a blue and green sign that says micromania zing on it
    a blurred image of a foreign language with a picture of a dog in the background .
    an advertisement for node js website development services shows a man working on a laptop
      a screenshot of a video game that says game is still in development
      a poster for best website designing services in delhi
      a white background with the words " il est interdit de braquer une personne avec le pettoire (ppa ) "
      two soccer players on a field with the words " subbuteo match days " on it
      a screenshot of a app called vent that is free
      a young man wearing a red hat and a red hoodie is taking a selfie on a verizon lte cellphone
      the doctors hospital inc. post graduate interns batch 2021
      a close up of a person 's signature on a piece of paper .
      a sign that says " welcome babe " with purple moons and crystals around it
      a blue background with the words " kisse ( mercy ) to you understood "
      a robot is sitting in front of a computer screen and the words ai bridge chain bot are below it
      a picture of a purple iphone on a white background .
      an optical illusion of a rainbow colored sphere on a black background
      a screenshot of a website in russian with a list of components
      a computer screen shows the state of california employment development department webpage
      j_rvd is the name shown on the screen
      a picture of a man with a mustache next to a foreign language text

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        a screenshot of a discord conversation between diskaf and phoseq
        a poster advertising a mesa presentation on october 13th at 18hs
        a surgical online 8 hegar medical dilator sounds set 7.5inch double ended instrument ( double ended )
        a screen shot of a video game that says superior shadow plate on it
        a screenshot of a clash of clans game shows a collection of emotes
        a yellow circle with a white check mark in it
        an advertisement for e nest website development shows a person using a laptop
        a screenshot of a test report on a cell phone shows that the test was completed .
        a subscribe button with a bell and a hand pointing at it on a transparent background .
        a screenshot of a person 's profile on a phone with a picture of a person in a circle .
        the word offline is displayed on a blue and black background
        a bald man with a mustache is being asked what will be the best memecoin
        a red light is shining in a dark room with the words low intelligence specimen below it
        a screenshot of a video game that says complete customization at the bottom
        a screenshot of a person 's profile with the name jakke # 5862