Got an error \end{thebibliography} while I used \bibliographystyle+\bibliography

Question

I was about to finish the LaTeX article for IEEE when I encountered an error in compiling the .bib file (called tacklingbib). This is part of the code for inserting bibliographic information

\bibliographystyle{ieeetran}
\bibliography{BibTeX/tacklingbib}

It was in the third stage of the process (1.pdfLaTex[successful], 2.BibTex[successful], 3. pdfLaTeX[error!]) that I received the following error:

Underfull \hbox (badness 10000) in paragraph at lines 973--974
(./Tackling_cite.bbl
! LaTeX Error: Something's wrong--perhaps a missing \item.
See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
l.24 \end{thebibliography}

I didn't use thebibliography, but I received its error! I deleted all the citations in the text unless the first one to see if there was any error in any of the citation commands. But the error repeated. This is the only cite in my .bib file:

@article{delen\_effects\_2014,
    title = {Effects of interactivity and instructional scaffolding on learning: {Self}-regulation in online video-based environments},
    volume = {78},
    issn = {03601315},
    shorttitle = {Effects of interactivity and instructional scaffolding on learning},
    url = {https://linkinghub.elsevier.com/retrieve/pii/S0360131514001511},
    doi = {10.1016/j.compedu.2014.06.018},
    language = {en},
    urldate = {2023-02-13},
    journal = {Computers \& Education},
    author = {Delen, Erhan and Liew, Jeffrey and Willson, Victor},
    month = sep,
    year = {2014},
    pages = {312--320},
}

It has only 15 lines and I wonder where the error was pointing by l.24! I'd appreciated it if anyone can help.