mehrere Fehlermeldungen bei subfloat Funktion

\documentclass[oneside,a4paper, 12pt, footlines=3, numbers=noendperiod]{scrreprt} 
\usepackage[pdftex]{graphicx}
\usepackage{scrlayer-scrpage}
\usepackage[labelfont={sf,md,sl}]{subfig}
\usepackage{float}
\begin{document}
\begin{figure}[t]
\subfloat[\centering{Text}]
{\includegraphics[width=.53\textwidth]{cow}}
\quad
\subfloat[\centering] 
{\includegraphics[width=.43\textwidth]{cow}}
\par\bigskip
\subfloat[\centering{Text}]
{\includegraphics[width=.53\textwidth]{cow} }
\quad
\subfloat[\centering{Text}]
{\includegraphics[width=.43\textwidth]{cow}}
\caption{(a) Beschreibung, (b) Beschreibung, (c) Beschreibung, (d) Beschreibung
\label{fig:cow}
\par\bigskip
\end{figure}
\end{document}

File: cow.pdf Graphic file (type pdf) Package pdftex.def Info: cow.pdf used on input line 44. (pdftex.def) Requested size: 233.73885pt x 169.99808pt. ! Undefined control sequence. \->let reserved@e relax let reserved@f relax @ifstar {let reserved... l.44 {includegraphics[width=.53textwidth]{cow}} The control sequence at the end of the top line of your error message was never def'ed. If you have misspelled it (e.g., \hobx'), typeI' and the correct spelling (e.g., I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. ! Argument of \sf@@@subfloat has an extra }. <inserted text> \par l.44 {\includegraphics[width=.53\textwidth]{cow}} I've run across a}' that doesn't seem to match anything. For example, \def\a#1{...}' anda}' would produce this error. If you simply proceed now, the \par' that I've just inserted will cause me to report a runaway argument that might be the root of the problem. But if your}' was spurious, just type 2' and it will go away. Runaway argument? {\centering {Text}}]{\def \reserved@a *{\let \reserved@e \vadjust \let \ETC. ! Paragraph ended before \sf@@@subfloat was complete. <to be read again> \par l.44 {\includegraphics[width=.53\textwidth]{cow}} I suspect you've forgotten a}', causing me to apply this control sequence to too much text. How can we recover? My plan is to forget the whole thing and hope for the best.