Wa alaikum assalam,
Yes, this song has a number of issues in its lyrics. The most apparent of these is shirk in worship, where the singer makes dua to the saint. The lyrics are:
“Baba Haji Ali, baba Haji Ali, suno hum gareebon ki iltija, hum par karam kijiye“
“Beloved Haji Ali, listen to us poor people and shower blessings on us.”
Dua can only be made to Allah, as he has said in Surah Al Jinn (72:18):
وَأَنَّ الْمَسَاجِدَ لِلَّهِ فَلَا تَدْعُوا مَعَ اللَّهِ أَحَدًا
“And [He revealed] that the Masajid (Masjids/Mosques) are for Allah, so do not make dua to anyone with Allah.”
Allah also said in Surah Al Fatir (35:13-14)
يُولِجُ اللَّيْلَ فِي النَّهَارِ وَيُولِجُ النَّهَارَ فِي اللَّيْلِ وَسَخَّرَ الشَّمْسَ وَالْقَمَرَ كُلٌّ يَجْرِي لِأَجَلٍ مُّسَمًّى ۚ ذَٰلِكُمُ اللَّهُ رَبُّكُمْ لَهُ الْمُلْكُ ۚ وَالَّذِينَ تَدْعُونَ مِن دُونِهِ مَا يَمْلِكُونَ مِن قِطْمِيرٍ (13) إِن تَدْعُوهُمْ لَا يَسْمَعُوا دُعَاءَكُمْ وَلَوْ سَمِعُوا مَا اسْتَجَابُوا لَكُمْ ۖ وَيَوْمَ الْقِيَامَةِ يَكْفُرُونَ بِشِرْكِكُمْ ۚ وَلَا يُنَبِّئُكَ مِثْلُ خَبِيرٍ (14
“He causes the night to enter the day, and He causes the day to enter the night and has subjected the sun and the moon - each running [its course] for a specified term. That is Allah, your Lord; for Him is the kingdom. And those whom you make dua to other than Him, own not even a Qitmeer (the thin membrane over a date stone). (13)
If you make dua to them, they do not hear your dua; and if they were to hear, they would not respond to you. And on the Day of Resurrection, they will deny your shirk. And none can inform you like Him Who is All-Aware. (14)”
It is clear from these ayat that dua is only for Allah, and if it is done to other than Allah it is shirk. The singer clearly makes dua to the dead saint to ask for blessings. There are also other issues with the song, but this one was very blatant.
Hope that answers the question, and Allah knows best.